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is a significant concern for physicians. Central: t$ P2 {. n6 X# ~& u
precocious puberty (CPP), which is mediated" A: n. K, U9 j/ C# L: n: C# k2 L
through the hypothalamic pituitary gonadal axis, has
: C6 i2 M: V; H y# q9 q: j7 Da higher incidence of organic central nervous system2 W6 P+ M$ t/ L2 R) j3 b% l
lesions in boys.1,2 Virilization in boys, as manifested
8 [. G! B8 ~1 F+ t5 R$ }3 u7 Dby enlargement of the penis, development of pubic
7 E" f& d" @' ahair, and facial acne without enlargement of testi-5 J$ O# i* c2 F8 F1 c$ M$ p
cles, suggests peripheral or pseudopuberty.1-3 We5 C' ^; V% s9 | M
report a 16-month-old boy who presented with the8 a' R/ F# W5 G
enlargement of the phallus and pubic hair develop-
/ k8 i% L3 ]" ?) M; t% U1 [ment without testicular enlargement, which was due; X+ k( U1 H6 a: M3 {
to the unintentional exposure to androgen gel used by9 T I3 k& W c2 b
the father. The family initially concealed this infor-4 v# g; }& e' \6 R# e
mation, resulting in an extensive work-up for this% D2 x- x. R9 ^! U) ^' ~% \! f# H4 K
child. Given the widespread and easy availability of
( p& X2 h/ k7 L! ^+ atestosterone gel and cream, we believe this is proba-* p* M5 t& U+ a
bly more common than the rare case report in the# r" v) d1 f3 S( q% a
literature.4( G" ~; i8 v& g4 X T
Patient Report) e' Y2 Y) D5 M" S! d' L) k5 Z
A 16-month-old white child was referred to the
7 d! P$ E# r$ Q% P3 vendocrine clinic by his pediatrician with the concern' p; G' {! Q) Y) {3 w! B" Q
of early sexual development. His mother noticed/ ~9 \* L# K) d. p% T
light colored pubic hair development when he was! Q0 C! `9 l: d6 x3 R
From the 1Division of Pediatric Endocrinology, 2University of
! R' X' V: I2 O( eSouth Alabama Medical Center, Mobile, Alabama." b9 m+ }# x/ H6 N0 o
Address correspondence to: Samar K. Bhowmick, MD, FACE,! I- J. P( D( C) \3 B$ \
Professor of Pediatrics, University of South Alabama, College of5 _ n8 C @, E i% W
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297; _. J# C9 e2 `- X+ Q7 [8 t9 \
e-mail: [email protected].
! N& {( [1 U& x, \3 \1 w. b( vabout 6 to 7 months old, which progressively became7 z3 e, G" N( W g; A
darker. She was also concerned about the enlarge-0 ^$ ]8 T3 @3 ^ W2 H$ f9 N
ment of his penis and frequent erections. The child$ c b5 n6 `5 e" _/ b
was the product of a full-term normal delivery, with+ L8 V/ E+ L7 K
a birth weight of 7 lb 14 oz, and birth length of
F z" H9 f+ w/ [20 inches. He was breast-fed throughout the first year" V' X- W- W2 v* K' G1 k
of life and was still receiving breast milk along with! {: V$ d) V. O I' q# s
solid food. He had no hospitalizations or surgery,( c% i( p- U) v
and his psychosocial and psychomotor development
% u0 J* y9 b2 Dwas age appropriate.' Y9 l) A. [0 U& ?! ` l+ n
The family history was remarkable for the father,' T1 o4 Y+ N$ b; z. c$ h
who was diagnosed with hypothyroidism at age 16,& Q% S" j( _' T8 x
which was treated with thyroxine. The father’s
$ S s5 \6 c4 R5 _, e2 t: V m1 Yheight was 6 feet, and he went through a somewhat
1 b% h3 M3 X3 p4 o, vearly puberty and had stopped growing by age 14.
U) j5 t0 e4 fThe father denied taking any other medication. The
5 {2 R6 H, R+ L5 dchild’s mother was in good health. Her menarche& w" N V# T- Q( q% A
was at 11 years of age, and her height was at 5 feet
, W; }' I" S* Z5 inches. There was no other family history of pre-
$ P6 S! @* Q) fcocious sexual development in the first-degree rela- d" ^; t" e# o3 y$ e2 Y7 Q0 K
tives. There were no siblings.8 A( Z& \4 k9 l1 f
Physical Examination
' ~5 @( u4 S6 f3 f4 y+ SThe physical examination revealed a very active,
) Y. o: Z3 A' S V2 }+ D% @playful, and healthy boy. The vital signs documented
3 ]4 @, r! N: [: }0 ea blood pressure of 85/50 mm Hg, his length was& f! K2 h4 }" ^
90 cm (>97th percentile), and his weight was 14.4 kg- w$ E* Z- U( J
(also >97th percentile). The observed yearly growth+ W, r* ~- L- a# a( b6 z
velocity was 30 cm (12 inches). The examination of; n0 D& t/ S/ D6 \' o9 G3 Z
the neck revealed no thyroid enlargement.
+ k/ ^; a I' w) K9 u) B* yThe genitourinary examination was remarkable for
3 L0 J6 n6 e2 h7 yenlargement of the penis, with a stretched length of% l$ w: o4 D9 N+ c
8 cm and a width of 2 cm. The glans penis was very well6 K$ U: f- I$ ]9 S* m: U1 o& C
developed. The pubic hair was Tanner II, mostly around6 E$ ~6 X# g6 a! g1 g* _1 h, A
540
: |4 N" N' ?3 H' tat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
- p) w5 I: v. g2 q8 R/ k" r0 qthe base of the phallus and was dark and curled. The+ F2 x i& I+ Y' }$ c4 X' N
testicular volume was prepubertal at 2 mL each.6 O# o- o( O5 r% v$ i. v/ S h
The skin was moist and smooth and somewhat
# g' h& b' G" doily. No axillary hair was noted. There were no
+ K7 `% N7 I3 O6 ?9 V1 b. t, qabnormal skin pigmentations or café-au-lait spots.: A5 \, m) f% h5 V6 y* E4 l
Neurologic evaluation showed deep tendon reflex 2++ e2 `, ?& @8 T
bilateral and symmetrical. There was no suggestion
# t- o: s! k/ F" }3 b0 @of papilledema./ h* j; C* P! Z
Laboratory Evaluation0 f3 |$ F7 v* d- J7 D. _0 \
The bone age was consistent with 28 months by
+ \$ C' S7 S. Z3 b8 h5 Iusing the standard of Greulich and Pyle at a chrono-3 {- K$ Q7 V5 j3 j& N8 G
logic age of 16 months (advanced).5 Chromosomal/ g& e" R! e' P2 C
karyotype was 46XY. The thyroid function test
' ]1 w( @- G; Wshowed a free T4 of 1.69 ng/dL, and thyroid stimu-) j8 _9 e4 o3 p4 E" Q
lating hormone level was 1.3 µIU/mL (both normal).3 x" C! B* D( v: E( M, e7 |
The concentrations of serum electrolytes, blood1 a0 j6 D: a. j1 Y1 X
urea nitrogen, creatinine, and calcium all were, z; Z/ O; R; X+ ~- q: T& ^
within normal range for his age. The concentration! i0 ]* y! S/ f: Q, U: L& u
of serum 17-hydroxyprogesterone was 16 ng/dL- n9 s; c* ?' \. P3 J. F s
(normal, 3 to 90 ng/dL), androstenedione was 20
5 R& w g d# N" G) @( |2 ang/dL (normal, 18 to 80 ng/dL), dehydroepiandros-0 H+ [3 [$ n+ o& \6 l
terone was 38 ng/dL (normal, 50 to 760 ng/dL),+ f0 X: E$ G6 D h
desoxycorticosterone was 4.3 ng/dL (normal, 7 to! D8 Z& L, Y" o, S8 x4 @& t' J, {
49ng/dL), 11-desoxycortisol (specific compound S)
; p6 ~- m' `$ x) o+ R4 I3 M3 twas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
; @, C) g$ o/ N0 c0 ptisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
$ n! ?5 d( N4 ]6 y% otestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
& [0 m+ W6 f, Yand β-human chorionic gonadotropin was less than% R4 }0 U* M) W" J+ ^
5 mIU/mL (normal <5 mIU/mL). Serum follicular
$ U8 R+ W6 [7 [stimulating hormone and leuteinizing hormone
9 ~ L7 N1 m: F5 m! V% n# Z( Uconcentrations were less than 0.05 mIU/mL( {# L6 }2 m. k
(prepubertal).
' J# @4 }) {# }, nThe parents were notified about the laboratory
2 T8 B3 w8 R% o5 L, D$ fresults and were informed that all of the tests were. E& E; ? W: J. a! B
normal except the testosterone level was high. The
: J! y: i* b. D- {. Qfollow-up visit was arranged within a few weeks to1 ~4 H2 d( v0 ^7 S# o1 k- Z
obtain testicular and abdominal sonograms; how-: j( e! m/ U4 C% R1 ]4 `
ever, the family did not return for 4 months.
9 T: d! a- t7 mPhysical examination at this time revealed that the( k/ S3 Y! K6 g% r. ~
child had grown 2.5 cm in 4 months and had gained1 L& `% x, J3 e) a5 _4 \/ L
2 kg of weight. Physical examination remained0 c* u4 t9 s; N6 C4 ^5 k. s
unchanged. Surprisingly, the pubic hair almost com-# Q: n% ^" {! i
pletely disappeared except for a few vellous hairs at
1 O& i5 i3 e( E, F" _3 W2 Mthe base of the phallus. Testicular volume was still 2/ _, `0 w' Z3 ~) S& Q
mL, and the size of the penis remained unchanged.& P. y6 m) w4 W. b2 `! }. u
The mother also said that the boy was no longer hav-- J5 K/ j! }; h/ K: p3 [: o
ing frequent erections.
5 @4 x" H' v3 I, b/ _3 P2 r' b. WBoth parents were again questioned about use of
0 J0 q9 J- z! c8 v5 ~# Hany ointment/creams that they may have applied to
/ Q6 P( {$ n8 v K; ]the child’s skin. This time the father admitted the. ?- a9 o. y6 c2 m# z" }
Topical Testosterone Exposure / Bhowmick et al 5411 u+ w5 Z, t7 }$ l
use of testosterone gel twice daily that he was apply-6 J8 |7 v; S+ S, Q0 m" c, g" _
ing over his own shoulders, chest, and back area for
6 |2 y, P( w k3 G J0 ^a year. The father also revealed he was embarrassed
# M! v9 t" W1 Z; zto disclose that he was using a testosterone gel pre-
1 M2 B- w$ s4 ^8 Yscribed by his family physician for decreased libido# j3 r6 z% M' w
secondary to depression.
1 G- a( {, \+ F2 O& q# Q+ uThe child slept in the same bed with parents.
, d+ K1 i6 ~7 I! g* H5 b9 [3 SThe father would hug the baby and hold him on his
- s# i. j- o1 R7 }- }3 N$ P( r7 fchest for a considerable period of time, causing sig-0 |% ` `2 o8 O$ z
nificant bare skin contact between baby and father.) p D* l; t1 [7 @7 \7 j
The father also admitted that after the phone call,
0 B8 @4 @* n3 V+ N. w1 n7 qwhen he learned the testosterone level in the baby
6 O: T4 S- @& V- g7 V3 Pwas high, he then read the product information6 X# C3 h6 }6 ^( X" h+ e/ O
packet and concluded that it was most likely the rea-/ u" @/ K; l$ d! B. Q
son for the child’s virilization. At that time, they; ?( E* \: j' r+ S6 h+ p9 C
decided to put the baby in a separate bed, and the
$ X' p% d& w& G0 o' A. qfather was not hugging him with bare skin and had. q5 Q1 O2 L- Z0 X. {& A, R
been using protective clothing. A repeat testosterone
- _8 P$ v$ e: ?- l3 ~test was ordered, but the family did not go to the! }9 R$ X2 M% L. G5 |
laboratory to obtain the test.% h9 C9 j/ J% B1 _% e! q
Discussion
' ?. l8 C0 l$ c% F' oPrecocious puberty in boys is defined as secondary
" G& s( J2 ^3 `sexual development before 9 years of age.1,49 i4 R# p5 `& O1 {& N" j/ Q% s
Precocious puberty is termed as central (true) when7 c5 Z0 \* g" a5 o5 B2 e
it is caused by the premature activation of hypo-
$ T8 w3 j; n' A( `thalamic pituitary gonadal axis. CPP is more com-: x \, ?9 n5 }1 c/ W7 h% N
mon in girls than in boys.1,3 Most boys with CPP
1 e- [" ~* d& I/ B( Umay have a central nervous system lesion that is1 [9 e, z: E8 _
responsible for the early activation of the hypothal-
1 ~# N" L' @1 w g# aamic pituitary gonadal axis.1-3 Thus, greater empha-/ n# C% b- h( a6 u) d: b1 J7 b' L. q
sis has been given to neuroradiologic imaging in ?* O# O9 w( D$ S
boys with precocious puberty. In addition to viril-
0 G/ h/ m y5 m1 j1 U) Y8 Yization, the clinical hallmark of CPP is the symmet-
* l& A- O) {( {$ T/ [( mrical testicular growth secondary to stimulation by* W' t; j- x# w% M9 d% q
gonadotropins.1,3$ q; Y6 K. \2 T; A
Gonadotropin-independent peripheral preco-
% z( T3 [" `6 f) tcious puberty in boys also results from inappropriate6 V% H/ A/ d1 q, N, I y" ~8 a
androgenic stimulation from either endogenous or+ f( o) o* H- X8 c8 z! b% y
exogenous sources, nonpituitary gonadotropin stim-( h0 s" ~. H: g- R2 N
ulation, and rare activating mutations.3 Virilizing, ]6 z1 X+ Q9 x$ x7 {5 r5 P9 h
congenital adrenal hyperplasia producing excessive* _( p2 B2 X/ |& ]. U
adrenal androgens is a common cause of precocious5 C; u$ N5 c; ~- m; H8 E
puberty in boys.3,4
* L9 v9 N. m4 f% g. b$ GThe most common form of congenital adrenal
# z7 E0 A! F& M7 Hhyperplasia is the 21-hydroxylase enzyme deficiency.# _3 s) j1 b8 s- |+ n0 S
The 11-β hydroxylase deficiency may also result in
4 b5 Q8 j' {/ A7 |7 W1 Wexcessive adrenal androgen production, and rarely, a; E! l8 y* D# l* [$ D; p6 ^. ^
an adrenal tumor may also cause adrenal androgen
, ~1 a4 D8 C; c2 l% s" B" xexcess.1,3; ]5 m9 l. W6 D6 Q7 X, P
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from/ R0 I8 l" [9 b2 I
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
: r! o/ ]2 a* E4 a6 YA unique entity of male-limited gonadotropin-+ {2 j) o% F: c" ]: \; t' c* |" ^
independent precocious puberty, which is also known& {. Q3 D3 C7 C+ }3 O
as testotoxicosis, may cause precocious puberty at a
- k( A R$ X: L* s! vvery young age. The physical findings in these boys
. H' q) Y. U! O5 [) c" Twith this disorder are full pubertal development,
6 {+ V$ Q+ A3 G4 f. u( Y( m+ Rincluding bilateral testicular growth, similar to boys) B* o$ E0 y" X. p
with CPP. The gonadotropin levels in this disorder
& {. O: t) O; zare suppressed to prepubertal levels and do not show J B5 {7 C! _+ p* h( S- B$ @
pubertal response of gonadotropin after gonadotropin-
/ j7 l6 G! \; V7 m3 z; c7 Freleasing hormone stimulation. This is a sex-linked! p0 X5 s2 a* C: S- o) t/ z
autosomal dominant disorder that affects only! P) o+ c+ `$ z* r- p
males; therefore, other male members of the family( B- E. ~. I9 N
may have similar precocious puberty.3
, t- U' s# c) [) p3 C& tIn our patient, physical examination was incon-
1 \! c1 O2 e( x9 \) m$ J; ?sistent with true precocious puberty since his testi-
% Z6 e6 z. {2 V$ X: f# l: c" Ucles were prepubertal in size. However, testotoxicosis
$ r a" D% S/ n) c) d1 s: Xwas in the differential diagnosis because his father
8 t" N' b5 l8 X" F% D( sstarted puberty somewhat early, and occasionally,
! E v9 }+ f Y" Jtesticular enlargement is not that evident in the4 F* G- j# c7 K
beginning of this process.1 In the absence of a neg-+ N2 I' }7 T+ t9 k8 y& Y
ative initial history of androgen exposure, our
4 Z* B- _8 X# sbiggest concern was virilizing adrenal hyperplasia,! ?4 a' X: E( W S5 c
either 21-hydroxylase deficiency or 11-β hydroxylase2 `' p/ Y# m) X, I
deficiency. Those diagnoses were excluded by find-# p/ s% ]6 `: ^3 \
ing the normal level of adrenal steroids.
* X* v9 M0 M: s6 \3 j* _/ f5 d8 r7 UThe diagnosis of exogenous androgens was strongly' w2 \: X- x* n5 r1 t8 I) N
suspected in a follow-up visit after 4 months because
8 ]: K, ~, d" e& \, D8 _the physical examination revealed the complete disap-; ?4 w0 Z/ {8 @, r
pearance of pubic hair, normal growth velocity, and
1 T j4 A9 C1 p! a* U: s) edecreased erections. The father admitted using a testos-' G5 n3 j, A) d
terone gel, which he concealed at first visit. He was5 L" P' r* U9 [: I- N
using it rather frequently, twice a day. The Physicians’0 b; R' V# b/ M( j
Desk Reference, or package insert of this product, gel or: o( T7 M0 k% O4 i* {' \ W
cream, cautions about dermal testosterone transfer to8 p/ R5 D4 s. f7 s& X
unprotected females through direct skin exposure. W! e, n( }7 P5 G5 z' @: x
Serum testosterone level was found to be 2 times the
8 g& N/ d5 k3 O- q' H0 ]4 U- ~baseline value in those females who were exposed to6 H) A# y% E E' y. z( h0 H2 B u/ f
even 15 minutes of direct skin contact with their male
. k! v, @3 x; m# Mpartners.6 However, when a shirt covered the applica-, K0 I0 V0 L4 Y* b& c+ {5 I
tion site, this testosterone transfer was prevented.
" ~. g3 ^+ N/ ]7 M. xOur patient’s testosterone level was 60 ng/mL,+ A: p1 Q4 ]0 i' n2 t Y; P1 W/ G
which was clearly high. Some studies suggest that8 w: h" B% a: s( S4 X
dermal conversion of testosterone to dihydrotestos-
6 G( B# w6 m w- d# Aterone, which is a more potent metabolite, is more) M1 O5 B' U" Z; V8 K5 l5 k
active in young children exposed to testosterone
0 w1 E" u. f% D) u6 iexogenously7; however, we did not measure a dihy-
; h1 }) {& l) c% t/ O( i* o7 Wdrotestosterone level in our patient. In addition to2 q/ \/ H+ }9 q: h+ @3 o8 t2 K
virilization, exposure to exogenous testosterone in) E* C/ q- t0 R4 a
children results in an increase in growth velocity and6 V% s: e- G' d/ M' h. Z& ?( P
advanced bone age, as seen in our patient.
9 N$ ]) G' B9 t0 qThe long-term effect of androgen exposure during
* L9 F, h+ R4 t3 {early childhood on pubertal development and final
, d P6 l U4 P7 Q" x( Qadult height are not fully known and always remain! p$ J9 Y! P: X3 R; Q( o
a concern. Children treated with short-term testos-
; N3 q0 p, R: q6 _0 ^terone injection or topical androgen may exhibit some
0 v0 B6 U9 l% ^- ?9 hacceleration of the skeletal maturation; however, after' ?6 ?4 S1 ]" {9 x
cessation of treatment, the rate of bone maturation( }2 v! d9 l7 Y, L! N
decelerates and gradually returns to normal.8,9
: `1 M, W8 _. c& q8 AThere are conflicting reports and controversy8 n! j' k9 e9 c. h9 L. R
over the effect of early androgen exposure on adult! Q5 [& O( |8 M# H. S4 _+ D8 D
penile length.10,11 Some reports suggest subnormal! A+ B* S' U+ u0 `
adult penile length, apparently because of downreg-
1 q6 W; |% S: a2 E; w' Fulation of androgen receptor number.10,12 However,% n' o/ o" C0 x4 e {- T# u8 v
Sutherland et al13 did not find a correlation between7 Y* o) Q: q6 w6 y8 A- d$ `
childhood testosterone exposure and reduced adult& M8 K" r2 X7 a8 z0 @9 h; S
penile length in clinical studies.
6 a6 `5 k' K/ \ n% V8 F, _. ^Nonetheless, we do not believe our patient is
9 O' `3 J6 X! |, t3 D; h2 E" Igoing to experience any of the untoward effects from
9 _4 J0 l0 z/ ]7 }9 {" f, etestosterone exposure as mentioned earlier because
6 v4 ]* m0 k6 a, [2 N! [ ethe exposure was not for a prolonged period of time.
& \! b6 ~3 B! e' P VAlthough the bone age was advanced at the time of
& G, S. ?( t' K7 n% Udiagnosis, the child had a normal growth velocity at+ O2 p/ C! ]3 A7 C4 o: O* v) e
the follow-up visit. It is hoped that his final adult( x/ l5 \ y6 j/ J5 }
height will not be affected.9 b9 i( r- u; w
Although rarely reported, the widespread avail-4 k" @9 G% k) ?* Z+ T% r
ability of androgen products in our society may$ t# q6 R, u3 `5 |) g5 B7 V7 `' _
indeed cause more virilization in male or female
7 x$ @" |" O8 C. W6 Q' V8 |children than one would realize. Exposure to andro-+ m6 @4 M v9 M! G% k5 t) T
gen products must be considered and specific ques-
3 s- N( b* _ g2 e- ?# y6 M. R' stioning about the use of a testosterone product or
# Z9 I+ w2 U' }7 Q) N4 `3 Wgel should be asked of the family members during
) X: j6 J! G+ a2 P fthe evaluation of any children who present with vir-
+ @3 F2 t" O2 R/ K6 n, ^; X! d3 I/ S: Hilization or peripheral precocious puberty. The diag-( H$ u9 E) Y2 H* {& y O# j6 u
nosis can be established by just a few tests and by
- `8 E8 w8 s4 K( ?appropriate history. The inability to obtain such a/ K; x$ p9 X6 ]( T4 S2 I8 w
history, or failure to ask the specific questions, may
+ R j' c k5 B" G7 b& R$ \; ]result in extensive, unnecessary, and expensive$ W0 D; X' O! z8 X/ i
investigation. The primary care physician should be) ^% T. n8 F. X: X
aware of this fact, because most of these children6 E! I4 u/ x! I
may initially present in their practice. The Physicians’
6 v( e9 v0 p% ]6 k- VDesk Reference and package insert should also put a
9 a3 W1 c7 M( C1 p! w# S, m- Bwarning about the virilizing effect on a male or
, M. O+ X9 b: {4 ?4 Pfemale child who might come in contact with some-
; {5 I J$ r E5 }one using any of these products.
6 h3 y% s- l& g$ v5 JReferences, |: q" e: j/ s1 d: q& g- b0 W
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Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;; C! T8 a! K4 F8 }4 r X
2002: 565-628.
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puberty in children with tumours of the suprasellar pineal
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4 i- v1 f4 x& s+ v6 R! X3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.* ~2 ]/ B" ~. V
Pediatric Endocrinology. 4th ed. New York, NY: Marcel- ^( g- d2 h. x4 X; q+ O
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4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual1 m: J8 F8 v+ k
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, P# h! Z$ m4 ~. X3 ?5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
7 n" d8 Z) d& w* D# H, n: SSkeletal Development of the Hand and Wrist. 2nd ed.
! H5 H3 B- y' LStanford, CA: Stanford University Press; 1959.- x& }$ g" i5 Z7 U
6. Physicians’ Desk Reference. Androgel 1% testosterone,
" @" _* u8 q0 ~Unimed Pharmaceutical Inc. Montvale, NJ: Medical5 ^4 j. \7 K4 P4 y
Economics Company, Inc; 2004:3239-3241.
+ |; @' r0 M; z& S7. Klugo RC, Cerny JC. Response of micropenis to topical
2 q% K1 A0 S) stestosterone and gonadotropin. J Urol. 1978;119:8 K. _+ l! u. u+ u
667-668.
O# U4 y# E% \9 g. [& i# l! A8. Guthrie RD, Smith DW, Graham CB. Testosterone
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